Concrete-construction form-brace.



i W. J. ANDERSON. CONCRETE CONSTRUCTION FORM BRAOE.

APPLICATION II'ILED MAY 21, 1913.

Patented June 23, 1914.

2 SHEETS-SHEET 1.

a: #4 #lliarw wue/wbog, JMIU'OM (lttoznug W. J. ANDERSON, GONGRETECONSTRUCTION FORM BRAGE.

APPLICATION FILED MAY 21, 1913.

Patented. June 23, 19145- w WV 0 m \km W m A W M v 1 c F m m F. 3 $1M gA m fikfi m g Mu r-Ea Eu J 5. H H4 J 0 m I! w N 1 sfilfi MM 1 a I WW afi 5m M W NH M V R N Q, Q% NM W N W LN b x 7 WW CONCRETE-commutatorr'onrt rnacn.

Specification or reasrsratemt Patefitedfl 111112 23, 19kt.

Application filed Mayer 19'13. senairmeacsa To all to hem it may concernj Be it known that LWIL IAM JJhNDERSON, a citizen of the United'States,residing at Menan'ds, in the county of Albany and State of New York,have invented new and useful Improvements in Concrete-ConstructionFor-nrBraces,-of which the following is a specification. V

The invention relates to form braces for concrete construction, and moreparticularly tothe class of adjustable form braces for constructingculverts, conduits, bridges or the llk'e from concrete or othercementitious I material.

The primary object ofthe'i-nvention is the provision of a form brace inwhich the parallel longitudinal bars are connected together through themedium of transverse cr -cross links which are pivoted thereto so thatthe formbrace can be readily and easily adjusted as regards. itshei ghtand width and also with respect to the length, thereby enabling the sameto be used for constructing culverts, conduits, bridges or'the like ofconcreteor' from other composition matter.

Another obj ect'of the invention is the provision'of a form bracewherein the same can be worked to vary the cross section thereof andheld rigid in such adjusted position, the construction of the bracebeing devoid of complicated mechanical parts which would necessarilyrequire skilled labor to operate.

A further object of the invention is the provision of a form brace inwhich the frame-work can readily and easily be put in position foruse-and also which can be removed Without any great lossof time, therebyaffording a convenient device for use in the building of concretestructures.

A still further object ofthe invention is the-provision of a formbrace'which is simple in construction, readily and easily adjusted,strong, durable, thoroughly reliable and efficient in its operation, andinexpensive in manufacture.

Vith these and other objects in view, the invention consists in theconstruction, combination and arrangement of parts as will behereinafter fully described, illustratedin the accompanying drawing, andpointed out in the claims hereunto appended.

In the drawings: Figure 1 is a side elevation of a form braceconstructed in accordance with the. invention. plan view thereof. Fig. 8is an end elevation. 'Fig. 4 is a sectional view on the line Fig. 2 is atop 44 of Fig- 1 Fig. 5 is a fragmentary side elevation ofthe formbracein adjusted posit on. Fig.- 6 is a vertical longitudinal sectionalview through thebrace.

Similar reference characters indicate corresponding parts throughout theseveral views in the drawings. 7

Referring to the drawings by numerals, the form brace comprises aplurality of 1011 gitudinal bars 10,- each being made from L- shapediron in cross section, of the required length.- Connected atintervals tothe flanges of the bars 10- are transversely disposed short bars orlinks 11 which have their ends engaged with pivots 12 mounted the saidbars 11 so that the bars or links 11 will swing in unison angularly withrespect to the bars 10, the latter being held parallel .with each otherthrough the medium of the bars or links 11 when being shifted so thatthe brace form may be readily and conveniently adjusted to vary thecross sectional area thereof, which is uniform throughout its extent.Interposed between the flanges of the bars 10 and the ends of the barsor links 11 pivoted thereto are washers 13 which avoid undue frictionbetween the bars when the form brace is being adjusted, the washersbeing supported in position by means of the pivots 12 which carry thesame.

Mounted at one end of the form brace are clamps, -preferably four innumber, each comprising a frame 14 which is suitably secured to*one ofthe longitudinal bars 10 and has arranged in its open center pivotallyconnected swinging and stationary jaws 15 and 16 respectively, thestationary jaw being secured by means of rivets 17, while threaded inone end of the frame 14: is a clamping screw 1'8, the inner end of whichworks against the swinging jaw 16, and its outer end is formed with ahandle 19 so that it may be readily turned for the looking or unlockingof the swinging jaw. The inner edges of thejaws 15 and 16- are formedwith convergent beveled working surfaces 20 for engagement with asubstantially wedgeshaped anchoring block 21 which is held fast by thejaws l5 and 16 when the said swinging jaw is moved into clampingrelation to the stationary jaw, the block 21 be ing provided with an eye22 to which is fastened one end of a releasing and adjusting cable 23,there being four of these and each one having its opposite end engagedwith the hook member 24 of a turn buckle 25, the

eye member 26 of which being fixed to the opposite end of the formbrace. This eye member 26 of the turn buckle 25 is mounted opposite endof the said stay cable is connected to the hook member 29 of a turnbuckle 30, the eye member 31 of Which is mounted on the Other end of thelongitudinal bar 10 to Which the clamp is fastened. The turn buckles 25and 30 are employed to permit of accurate adjustment of the form bracewith regard to height and width; The cable 23 permits the adjustment ofthe form brace and also the clamp therefor permits the release of thecable so that the said form brace can be collapsed, while the stay cable27 sustains the form brace adjusted and against collapsing.

The longitudinal bars 10 are each made up of a plurality of sections 32and 33 respectively, so that the length of the form brace can be variedas the occasion requires. The sections 32 of the bars 10 have fixedthereto joining, collars or clips each comprising inner and outerL-shaped plates 34 and 35 which are united to one end of each section 33by means of rivets, and between these plates are frictionally engagedthe ends adjacent thereto of the sections 33 for the joining of the saidsections 32 and 33.

Secured at intervals to the longitudinal bars 10 at one side of the formbrace are roller sheaves 36 in Which are journaled supporting rollers37, the side of the form brace carrying the rollers being designated asthe bottom thereof, and these rollers permit the convenient and easymoving of the form brace into positions for constructing a culvert,conduit, bridge or the like from concrete or other composition material.

In. the use of the form brace the same is positioned at the requiredlocation and adjusted according to the desired height and Width of theopening to be made for the forming of the culvert, conduit, bridge orthe like, and thereafter the frame-work forms are positioned about theform brace .Fig. 3 of the drawing.

exteriorly thereof, the frame-work forms being of the ordinarywell-known eonstruction, one example of which is illustrated in Afterthe frame work forms are positioned the concrete or other compositionmaterial is'deposited in the usual manner, and whentheisame has beenallowed to set it is necessary to remove the frame-work form and theframe brace.

from the opening, and this is done by loosening the screws 18, whichpermit the swinging of the jaws 15 to pOSltlOn for freeing the.

blocks "21, thereby releasing the releasing and adjusting cables 23which permits the collapsing of the frame brace so that the frame-workforms can'be readily removed from the opening, and thereafter the framebrace is removed, it being understood of course that the stay cables donot have to be released or detached for the collapsing of the framebrace.

From the foregoingit is thought thatthe construction and manner ofoperation of the device will be clearly understood-, and therefore amore extended explanation has been omitted. y i

What is claimed is 1. A form brace comprising an adjustable andcollapsible four-sided form structure, each sidebeing adjustable to varythe area thereof, means for sustaining the said sides in adjustedposition, and rollers supported by one of the sides.

2. A forni'b-race comprising an adjustable and collapsible four-sidedform structure,

each side being adjustable to vary the area thereof, means forsustaining the said sides in adjusted position, rollers supported by oneof the sides, and means for detaching the V adjusting means.

3. A form brace comprising an adjustable and collapsible four-sided formstructure, each side being adjustable to vary the area thereof, meansfor sustaining the said sides in adjusted position, rollers supported byone of the sides, means for detaching the adjusting means, and turnbuckles engaged with the said adjusting means.

I testimony whereof I affix my signature in presence of two witnesses.

WVILLI-AM J. ANDERSON.

Witnesses: I

ALLAN A. GRIFFIN, J OHN D. CAHILL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of latent s.

Washington, .D. G. r

